Re: [Xen-devel] [PATCH] xenstore: increase default thread stack size to 32k

[Juergen Gross <jgross@xxxxxxxx>]

On 22/02/18 12:33, Ian Jackson wrote:
> Juergen Gross writes ("Re: [Xen-devel] [PATCH] xenstore: increase default 
> thread stack size to 32k"):
>> The main problem is that any thread local storage is taken from the
>> stack without any interface being available for adjusting the _real_
>> stack size instead of the meory for thread local storage + stack.
>>
>> So we can increase the stack size of the xenstore thread and wait for
>> the next breakage, or we have to think about a proper solution.
>>
>> Right now I have no sensible idea how to address the problem, as the
>> old thread suggests the underlying glibc problem isn't fixed yet (wow:
>> the problem is known for more than 7 years now):
>>
>> https://sourceware.org/bugzilla/show_bug.cgi?id=11787
> 
> Oh!
> 
> Thank you, Juergen, for providing facts!
> 
> I withdraw my ack on this patch.
> 
> I agree with all the complaints in the libc bugzilla and disegree with
> glibc upstream.  I think this should be fixed in the libc.  Sadly the
> libc bugzilla doesn't have a libc patch.
> 
> I would accept a workaround in libxenstore that does something similar
> to what they do in Rust...

Yeah, the Rust solution seems to be sensible.

The source patch is easy. How to add the linker flag ("-ldl")? Just do
it in the Makefile of xenstore, or via configure?


Juergen

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